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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A320190 Number of integer solutions to a^2 + 2*b^2 + 3*c^2 + 9*d^2 = n.

Table of values

n a(n)
0 1
1 2
2 2
3 6
4 6
5 4
6 12
7 4
8 2
9 16
10 4
11 12
12 30
13 16
14 20
15 40
16 14
17 8
18 42
19 8
20 28
21 60
22 20
23 32
24 44
25 22
26 8
27 46
28 28
29 36
30 84
31 36
32 18
33 40
34 32
35 8
36 80
37 40
38 40
39 120
40 36
41 24
42 56
43 40
44 44
45 140
46 48
47 48
48 126
49 22
50 62
51 64
52 40
53 68
54 132
55 72
56 52
57 120
58 52
59 60
60 136
61 56
62 36
63 160
64 46
65 64
66 180
67 40
68 48

List of values

[1, 2, 2, 6, 6, 4, 12, 4, 2, 16, 4, 12, 30, 16, 20, 40, 14, 8, 42, 8, 28, 60, 20, 32, 44, 22, 8, 46, 28, 36, 84, 36, 18, 40, 32, 8, 80, 40, 40, 120, 36, 24, 56, 40, 44, 140, 48, 48, 126, 22, 62, 64, 40, 68, 132, 72, 52, 120, 52, 60, 136, 56, 36, 160, 46, 64, 180, 40, 48]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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